User`s manual

82 System Resources
IRQ Lines APIC Mode
IRQ#
Typical Interrupt
Resource
Connected to Pin Available
0 Counter 0 N/A No
1 Keyboard controller N/A No
2
Cascade interrupt from
slave PIC
N/A No
3
Serial Port 2 (COM2) /
PCI / ISA
IRQ3 via SERIRQ,
IRQ3 at ISA bus
Note (1)
4
Serial Port 1 (COM1) /
PCI / ISA
IRQ4 via SERIRQ,
IRQ4 at ISA bus
Note (1)
5
Parallel Port 2 (LPT2) /
PCI / ISA
IRQ5 via SERIRQ,
IRQ5 at ISA bus
Note (1)
6 Floppy Drive Controller IRQ6 via SERIRQ No
7
Parallel Port 1 (LPT1) /
PCI / ISA
IRQ7 via SERIRQ,
IRQ7 at ISA bus
Note (1)
8 Real-time clock N/A No
9 SCI / PCI
IRQ9 via SERIRQ,
IRQ9 at ISA bus
Note (1), (2)
10 PCI / ISA
IRQ10 via SERIRQ,
IRQ10 at ISA bus
Note (1)
11 PCI / ISA
IRQ11 via SERIRQ,
IRQ11 at ISA bus
Note (1)
12 PS/2 Mouse / PCI / ISA
IRQ12 via SERIRQ,
IRQ12 at ISA bus
Note (1)
13 Math Processor N/A No
14
Primary IDE controller /
PCI / ISA
IRQ14 via SERIRQ,
IRQ14 at ISA bus
Note (1)
15
Secondary IDE
controller / PCI / ISA
IRQ15 via SERIRQ,
IRQ15 at ISA bus
Note (1)
16 N/A
PCI Slot 1/2/3/4, PCIE
Port 0/1/2/3/4/5 UHCI
Controller 4/6, PEG Root
Port, I.G.D
Yes
17 N/A
PCI Slot 1/2/3/4, PCIE
Port 0/1/2/3/4/5, PEG
Root Port,
Yes